Repairing Effects of Diglucosyl Gallic Acid on Coloring-Damaged Hair

Abstract

The hair of consumers using hair colors frequently suffers from serious damage to silky feeling on their hair, of which surface turns hydrophilic with hair dye and hair bleach. The damaged hair can be dramatically recovered with applying diglucosyl gallic acid (DGA) and alkyl quaternary ammonium salt on the colored hair. These compounds form a hydrophobic layer (artificial F-layer) on the damaged surface of cuticle, and anchor so firmly that the artificial F-layer is hardly washed off with shampoo. DGA is proposed to be a new cosmetic ingredient, which is a very useful agent for the recovery of damaged hair due to coloring.